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Systemic complement depletion inhibits experimental cerebral vasospasm

J W German1, C E Gross, P Giclas

  • 1Department of Surgery, University of Vermont College of Medicine, Burlington, USA.

Neurosurgery
|July 1, 1996
PubMed
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Complement activation contributes to cerebral vasospasm after subarachnoid hemorrhage (SAH). Depleting complement with cobra venom factor (CVF) significantly reduced vasospasm in a rabbit SAH model.

Area of Science:

  • Neurology
  • Immunology
  • Vascular Biology

Background:

  • Cerebral vasospasm is a major complication following aneurysmal subarachnoid hemorrhage (SAH), leading to significant morbidity and mortality.
  • Emerging evidence suggests the complement cascade plays a role in the pathogenesis of cerebral vasospasm.

Purpose of the Study:

  • To investigate the role of complement activation in the development of cerebral vasospasm after SAH.
  • To evaluate the therapeutic potential of complement depletion in mitigating SAH-induced vasospasm.

Main Methods:

  • A rabbit model of SAH was established by injecting autologous arterial blood into the perimesencephalic cistern.
  • Animals were pretreated with cobra venom factor (CVF), a complement-depleting agent, or vehicle before SAH induction.

Related Experiment Videos

  • Morphometric analysis of the basilar artery was performed 48 hours post-SAH to assess vasospasm, with serum complement activity confirmed to be reduced.

    • Main Results:

    • Pretreatment with CVF significantly reduced the extent of cerebral vasospasm.
    • The lumen diameter of the basilar artery was significantly larger in SAH rabbits treated with CVF compared to those receiving vehicle.
    • CVF administration confirmed a significant reduction in serum complement activity.

    Conclusions:

    • Complement activation appears to play a significant role in the development of cerebral vasospasm following SAH.
    • Complement inhibition may represent a potential therapeutic strategy for managing SAH-induced vasospasm.